Arc light



(No Model.) 2 Sheetssheet 2.

D. B. TURNER.

I"ml!IIIIIIIIIQ- F are detail views of the clutch.

DONLEE B.

PATENT TURNER, OF CHICAGO, ILL NOIS.

ARC LlGHT.

SPECIPICAI'IDII forming part of Letters Patent No. 393,405, dated Haia-titer Application filed May 7, 1888. Serial No. 273.091. .(No model.)

To aZZ whom it may concern:

Be it known that I, DONLEE B. TURNER, a. citizen of the United States,residing at Ohicago, in the county of Cook and State of Illinois, haveinvented acertain new and useful Improvement in Are Lights, of which thefol lowing is a specification.

My invention relates to are lights and has for its object to provide aconvenient and cheap lamp in which both carbons are fed. This object[accomplish by means of the mechanism illustrated in the accompanyingdrawings, wherein Figure 1 is a side View of the upper portion of mylamp. Fig. 2 is a vertical section through the same. Fig. 3 is a sideview of the entire lamp with certain portions hroken away. Fig. 4 is adiagrammatic view of the lamp out of circuit. Fig. 5 is a diagrammaticview of the same in circuit. Figs. 6 and 7 Fig. 8 is a cross-section anddetail of the reciprocating core.

Like parts are indicated by the same letters in all the figures.

A isthe cover or top of the lamp, in which is secured thecarbon-protector B, and from which depend the tubular arms C- O. Thesearms are connected about midway by the nonheat conducting plate D andbelow by the base of the lamp, which carries the carbonprotector Babove.

G is the upper carbon; G, the lower.

H is a rock-shaft journaled on lugs which project from the tubes 0 C,and having pro jecting from it the arm H, which is upwardly drawn at itsouter extremity by the spiral spring H", also the arm H, which ispivoted at its extremity to the rod H*, adapted to reciprocate withinthe tube 0. The lower end of the rod H is pivoted to the lever H whichin turn is pivoted to the opposite tubular piece, (J, at the point H.This lever H is bifur cated and has loosely between its portions theclutch-block J, through an aperture in the center of which passes thecarbon G, and which is also provided with one or more inclined holes, J,which terminate in said apen ture. In each of said holes is a ball,J,which bears against the carbon, and thus keeps the same from slippingdownwardly in the clutch. I

\Vithin the base or cross-piece E is formed the elutchblock K,similarlyconstructed, having a hole, K, with a ball, li therein. To this block K,which forms part of the base E, is attached the carbonproteetor F. Tothe rock-shalt H is rigidly secured the arm L, which is provided abovewith the slot L to engage the pin L on the reciprocating core M. Thiscore is composed at one end of iron and at the other of nonmagnetizingsubstance, as brass, the two being brought to gether at the point M, andeach of these ends terminatcs in a part-cylindrical portion, ill" M,which move, respectively, within the coils of the magnets, each of whichrestsupon the marble roller or hall 31* M to permit the core to easilyreciprocate, said marble moving within the magnets.

To the lower end of the carbonprotector B are attached the guideways NN, in which move the arms N N, to which is attached the clutchblock N".This clutch-block encircles the carbon G and has the inclined hole Nmarble N", and loose pin N", the latter adapted to engage the crosspieceD when the clutchblock N is lowered.

O is a binding-post, to which the line-wire O is attached. 0 is a secondbinding-post, to which the other terminus of the line-wire O isattached.

0* is a heavy conductor passing from con nection with the binding-post Oto the internal winding O on the magnet O. This conductor 0 passesthence to the contactpoint O, which receives the pivoted lever 0 t0which the conductor 0 is attached. This latter connects directly withthe binding'post O". The light-conductor l? in like manner passes fromthe binding-post O to the fine winding P on the magnet O and thencedirectly to the binding-post 0 From the binding-post 0 connection ismade directly, as indicated in the diagrammatic view, by the conductorIt with the upper carbon, while from the lower carbon proceeds theconductor R, which passes into the electro magnet It and thence to thebindingpost.

The use and operation of my invention are as follows: The position ofthe parts shown in Fig. 4the diagrammatic viewillustrates the lamp whenout of use. In this position it will be when from any defect in theoperation of the carbons the lamp fails to work, thus cutting itself outautomatically. The current then enters through the line-wire 0, bindingpost 0, conductors 0* and P, both windings of the magnet O, conductor P,directly to the binding-post 0*, onto the line-wire O and by the heavyconductor 0 to the contact-point O lever O conductor 0", into thebindingpost of the line-wire. If the lamp is in condition for successfuloperation, this current through the magnet O will move the reciprocatingcore M toward the left, thus operating the rock-shaft H, and it willcontinue this motion until the rock-shaft has rotated so far as to lowerthe carbons until the arc is formed. XVhen this takes place, a portionof the current passes from thebinding-post 0 along the conductor B,through the carbons, conductor It, through the magnet R", conductor R,bind ing-post O", and line wire 0 thus energizing the magnet R NVhenthis occurs, the lever O is drawn up against the magnet It and theconnection across the conductor 0" is broken and a steady current thrownthrough the carbons. As this current varies in intensity, owing to thevarying distance between the carbons, it keeps the reciprocating core Min motion, so as constantly to keep the carbons adjusted the properdistance.

It will be observed that as the rock shaft moves it raises or lowersboth carbons simultaneously so long as they are held firmly by theclutches; but the lower one is moved only one-half the distance of theupper, as it is sus pended about midway. The lever H and the arms whichoperate the upper carbon,and also operate the bar H from the lever 1-1are of the same length. \Vhen the current through the magnet 0 becomestoo strong on account of the deflecting of the current through thecarbons, the rock-shaft is moved fartherin its bearings until the upperclutch, N", is lowered, so that its releasing-pins engage the plate Dwhen the carbon is made free and drops downwardly upon the other point.If it drops the entire distance, so as to engage the point of the lowercarbon, a strong current passes through both, and there is an immediatereaction upon the rock-shaft, thus causing both carbons to ascendslightly, the upper more rapidly than the lower, and thus the arc isformed.

Having thus described my invcntion,what I claim, and desire to secure byLetters Patent, is as follows: I

1. In an are light, the combination ofa rockshaft with one arm, aretracting-spring attached thereto, which tends to turn the shaft in onedirection, a second arm connected with the core of the magnet, themotion of which magnet operates the sl1aft,and two other arms and meanswhereby the carbons are supported on the latter arms, so that as thecurrent through the magnet varies the position of the rock-shaftchanges, and thus the relation of the carbons to each other is varied toeffect the are.

2. In an are light, the combination of the carbons with clutches, theclutch for the lower carbon consisting of two blocks containing inclinedapertures and locking-balls therein,and the clutch for the upper carbonconsisting of a single aperture and locking-balls therein and a stopblock or cross-piece about the carbon and beneath the upper clutch, andpins projecting from the upper clutch -bloek and adapted to engage andthus raise the lockballs when the clutch is lowered upon thecross-piece, and a rock-shaft from which both carbons are suspended,substantially as shown and described.

3. In an are light, the combination of the .l'fiONLEE B. TURNER.

XVitnesses:

Faancrs W. Pnnnnn, CELESTE I. CHAPMAN.

